Q. No.An inorganic salt in its aqueous solution produced a white ppt with \(NaOH\) which dissolve in excess of \(NaOH.\) . Its aqueous solution produces light yellow ppt with \(AgNO_3\) and sparingly soluble in \(NH_4OH.\) . This salt, probably, is:
1. \(AlBr_3\)
2. \(AlI_3\)
3. \(AlCl_3\)
4. \(ZnCl\)
Subtopic: Detection of Cations |
51%
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Which of the following does not respond to the chromyl chloride test?
1. \(HgCl_2\)
2. \(CuCl_2\)
3. \(N iCl_2\)
4. \(MnCl_2\)
1. \(HgCl_2\)
2. \(CuCl_2\)
3. \(N iCl_2\)
4. \(MnCl_2\)
Subtopic: Detection of Cations |
65%
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Which of the following forms a black precipitate when \(H_2S\) gas is passed through its solution?
1. Acidic \(AgNO_3\)
2. \(Mg(NO_3)_2\)
3. Ammoniacal \(BaCl_2\)
4. All of them
1. Acidic \(AgNO_3\)
2. \(Mg(NO_3)_2\)
3. Ammoniacal \(BaCl_2\)
4. All of them
Subtopic: Detection of Cations |
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Which of the following combines with \(Fe ~(II) \) ions to form a brown complex?
1. \(N_2O \)
2. \(NO \)
3. \(N_2O_3 \)
4. \(N_2O_5 \)
1. \(N_2O \)
2. \(NO \)
3. \(N_2O_3 \)
4. \(N_2O_5 \)
Subtopic: Detection of Anions | Detection of extra elements |
78%
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Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produces purple colour ion due to formation of:
1. \(Na[Fe(H_2O)_5NOS]2 \)
2. \(Na_2[Fe(H_2O)_5NOS] \)
3. \(Na_3[Fe(CN)_5NOS] \)
4. \(Na_4[Fe(CN)_5NOS] \)
1. \(Na[Fe(H_2O)_5NOS]2 \)
2. \(Na_2[Fe(H_2O)_5NOS] \)
3. \(Na_3[Fe(CN)_5NOS] \)
4. \(Na_4[Fe(CN)_5NOS] \)
Subtopic: Detection of Anions |
62%
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The reagent used in the chromyl chloride test is:
1. \(K_2CrO_4 \)
2. \(CrO_3 \)
3. \(K_2Cr_2O_7 \)
4. \((NH_4)_2Cr_2O_7 \)
1. \(K_2CrO_4 \)
2. \(CrO_3 \)
3. \(K_2Cr_2O_7 \)
4. \((NH_4)_2Cr_2O_7 \)
Subtopic: Detection of Cations |
71%
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Two test tubes containing nitrate and bromide are treated separately with conc. H2SO4. Brown fumes, thus evolved, are passed in water. The water will be coloured by vapours evolved from the test tube containing:
1. Nitrate
2. Bromide
3. Both (a) and (b)
4. None of these
1. Nitrate
2. Bromide
3. Both (a) and (b)
4. None of these
Subtopic: Detection of Anions |
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The solution of a chemical compound (X) reacts with \(AgNO_3\) solution to form a white precipitate of (Y) which in turn dissolves in \(NH_4OH \) to give a complex (Z). When (Z) is treated with dilute \(HNO_3,\) (Y) reappears. The chemical compound X can be :
1. \(NaCl \)
2. \(CH_3Cl \)
3. \(NaBr \)
4. \(NaI \)
1. \(NaCl \)
2. \(CH_3Cl \)
3. \(NaBr \)
4. \(NaI \)
Subtopic: Detection of the functional groups |
71%
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When dil. H2SO4 is introduced to an inorganic mixture at a low temperature, an odourless, colourless gas is produced. The mixture includes:
1. Sulphite
2. Acetate
3. Nitrite
4. Carbonate
1. Sulphite
2. Acetate
3. Nitrite
4. Carbonate
Subtopic: Detection of Anions |
67%
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When bismuth chloride is poured into a large volume of water, the formula for the white precipitate produced is:
1. \(Bi(OH)_3\)
2. \(Bi_2O_3 \)
3. \(BiOCl \)
4. \(Bi_2OCl \)
1. \(Bi(OH)_3\)
2. \(Bi_2O_3 \)
3. \(BiOCl \)
4. \(Bi_2OCl \)
Subtopic: Detection of Cations |
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